There's always the old piece of wisdom from the Unix jungle: "If you write a complex shellscript, sooner or later you'll wish you wrote it in a real programming language."

I wrote a huge PowerShell script over the past few years. I was like "Ooh, guess this is a resume item if anyone asks me if I know PowerShell." ...around the beginning of the year I rewrote the bloody thing in Python and I have zero regrets. It's no longer a Big Mush of Stuff That Does a Thing. It's got object orientation now. Design patterns. Things in independent units. Shit like that.